Letter from John Muir to [William] Colby, 1911 Jan 3

Chicago citation style
John Muir. Letter from John Muir to [William] Colby, 1911 Jan 3. 1911 Jan 3. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2h4nf0bj. (Accessed December 16, 2018.)
APA citation style
John Muir, (1911 Jan 3) Letter from John Muir to [William] Colby, 1911 Jan 3. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2h4nf0bj
MLA citation style
John Muir. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2h4nf0bj>.
Note: These citations are programmatically generated and may be incomplete.